Please expand on your symptom description...does it try, but fail? Do any of the LEDs light up? Does it get part way through the loading bar? Some other symptoms? Please be complete and exact as the precise symptoms you see may well point in a different direction for remedy attempts.
Good luck and let us know!
Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.